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Dave Jiang
ef84230223
MAP_SYNC is a nop for device-dax. Allow MAP_SYNC to succeed on device-dax
to eliminate special casing between device-dax and fs-dax as to when the
flag can be specified. Device-dax users already implicitly assume that they do
not need to call fsync(), and this enables them to explicitly check for this
capability.
Cc: <[email protected]>
Fixes: b6fb293f24 ("mm: Define MAP_SYNC and VM_SYNC flags")
Signed-off-by: Dave Jiang <[email protected]>
Reviewed-by: Dan Williams <[email protected]>
Signed-off-by: Dan Williams <[email protected]>